Zuber Prop Nuts for 3/16" Shaft with 10-32 threads (3 Pack) Special anti-corrosion coating for rust resistance and easy threading. Mil Spec for aircraft. These fit most 3/16" prop shafts that have a 10-32 thread end. For example, AeroMarine, Octura, Hughey, OSE, Speedmaster and many more of 3/16" Prop Shafts made in the USA. INCLUDES:(3) 10-32 Threaded Stainless steel threaded prop nuts.